Solve a 4th degree polynomial using vector

2013 11 5
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更新时间：2013 11 5
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I have this 4th degree polynomial y = 5*65.836*x^4 - 4*195.93*x^3 + 3*231.34*x^2 - 2*135.85*x + 39.902
I have multiple values of Y, exactly 92 values and I want the corresponding X for each. The Y values are in vector and I want the X answers to be in a vector.

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回答（1 个）

Sean de Wolski
Sean de Wolski 2013-11-5

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I would subtract through by y and use fzero to solve for x.
doc fzero

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